<template>
  <div>
    <h1 v-text="msg" ref="title"></h1>
    <button ref="btn" @click="showDOM">点我输出上方的DOM元素</button>
    <School ref="sch"/>
  </div>
</template>

<script>
//引入School组件
import School from './components/School'

export default {
  name: 'App',
  components: {School},
  data() {
    return {
      msg: '欢迎学习Vue！'
    }
  },
  methods: {
    showDOM() {
      // this 指向的vc   VueComponent
      console.log(this.$refs.title) //真实DOM元素
      console.log(this.$refs.btn) //真实DOM元素
      console.log(this.$refs.sch) //School组件的实例对象（vc）
    }
  },
}
</script>
